at Santa Clara Convention Center on 22 Oct 2012 – 25 Oct 2012

at Santa Clara Convention Center on 17 Oct 2011 – 20 Oct 2011

at Sheraton Gateway Suites O'Hare Hotel, Rosemont, IL on 18 May 2010 – 21 May 2010

at San Jose, CA on 20 Jul 2009 – 24 Jul 2009